Would you buy one?”
If it’s affordable would buy first time just to try it out. After that would depend on the taste and cost.
I can see this being a viable option for a niche market - grab a slice as you are running to catch a plane, school lunch rooms, food courts. I think success will depend on cost, taste and whether machines can continue running without downtime for maintenance.
In the video, the cameraman said it was the best 3 Euros they spent in Europe, so if 3 Euro's then = $4.10.